If I could make any scientific discovery true, I would make the theory that everything orbitted around the earth. if it was this way, humans wouldn't have to think of a way to go to the moon, and populate there. An invention I could bring back is the reflecting telescope. I know we have better telescopes now, but I would like it better if it was a portable one. Having a portable telescope would be fun to look at planets on certain days, and see the texture of the moon and many other planets. Also I would let people use it, and I might even find incoming asteroids, and report to NASA, or 911. and save the world.